/**
 * 
 */
package com.youth.fund.hk.hostManager.shiro.realm;

import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.LockedAccountException;
import org.apache.shiro.authc.SimpleAuthenticationInfo;
import org.apache.shiro.authc.UnknownAccountException;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.apache.shiro.util.ByteSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;

import com.youth.fund.hk.hostManager.shiro.datamodel.User;
import com.youth.fund.hk.hostManager.shiro.service.UserService;

/**
 * @author Sunk_Sky
 *
 *         2014年11月14日上午2:01:54
 */
public class UserRealm extends AuthorizingRealm
{

	@Autowired
	@Qualifier("UserService")
	private UserService userService;

	@Override
	protected AuthorizationInfo doGetAuthorizationInfo(
			PrincipalCollection principals)
	{
		String username = (String) principals.getPrimaryPrincipal();

		SimpleAuthorizationInfo authorizationInfo = new SimpleAuthorizationInfo();
		authorizationInfo.setRoles(userService.findRoles(username));
		authorizationInfo.setStringPermissions(userService
				.findPermissions(username));
		return authorizationInfo;
	}

	@Override
	protected AuthenticationInfo doGetAuthenticationInfo(
			AuthenticationToken token) throws AuthenticationException
	{

		String username = (String) token.getPrincipal();

		User user = userService.findByUsername(username);

		if (user == null)
		{
			throw new UnknownAccountException();// 没找到帐号
		}

		if (Boolean.TRUE.equals(user.getLocked()))
		{
			throw new LockedAccountException(); // 帐号锁定
		}

		// 交给AuthenticatingRealm使用CredentialsMatcher进行密码匹配，如果觉得人家的不好可以自定义实现
		SimpleAuthenticationInfo authenticationInfo = new SimpleAuthenticationInfo(
				user.getUsername(), // 用户名
				user.getPassword(), // 密码
				ByteSource.Util.bytes(user.getCredentialsSalt()),// salt=username+salt
				getName() // realm name
		);
		return authenticationInfo;
	}

	@Override
	public void clearCachedAuthorizationInfo(PrincipalCollection principals)
	{
		super.clearCachedAuthorizationInfo(principals);
	}

	@Override
	public void clearCachedAuthenticationInfo(PrincipalCollection principals)
	{
		super.clearCachedAuthenticationInfo(principals);
	}

	@Override
	public void clearCache(PrincipalCollection principals)
	{
		super.clearCache(principals);
	}

	public void clearAllCachedAuthorizationInfo()
	{
		getAuthorizationCache().clear();
	}

	public void clearAllCachedAuthenticationInfo()
	{
		getAuthenticationCache().clear();
	}

	public void clearAllCache()
	{
		clearAllCachedAuthenticationInfo();
		clearAllCachedAuthorizationInfo();
	}

}
